A combinatorial approach for studying the effect of Mg concentration on precipitation in an Al-Cu-Li alloy

TL;DR

This study uses a combinatorial and in-situ X-ray scattering approach to analyze how varying Mg concentrations influence precipitation kinetics and strengthening in an Al-Cu-Li alloy.

Contribution

It introduces a novel combinatorial method combined with in-situ measurements to evaluate Mg's effect on precipitation in aluminum alloys.

Findings

Mg promotes T1-Al2CuLi phase precipitation.

Precipitation kinetics vary with Mg concentration.

Strengthening correlates with Mg-induced precipitate formation.

Abstract

We apply a combinatorial approach to study the influence of Mg concentration on the precipitation kinetics in an Al-Cu-Li alloy using a diffusion couple made by linear friction welding. The precipitation kinetics is monitored in the composition gradient material using simultaneous space and time-resolved in-situ small-angle X-ray scattering measurements during ageing, and the strengthening of the precipitates is evaluated by micro-hardness profiles. This data provides an evaluation of the amount of Mg necessary to promote precipitation of the T1-Al2CuLi phase.